Rockwell Collins, Cedar Rapids, Iowa, was awarded a $57,001,423 firm-fixed-price and cost-plus-fixed-fee contract for KC-135 Avionics Sustainment Engineering Services (ASES). This contract provides for sustainment of the avionics, communications and electrical systems, subsystems, related avionics systems components, and associated ground and flight software used on the KC-135 aircraft weapon systems. This acquisition will include ASES services for Foreign Military Sales to Chile, France, and Turkey. Work will be performed at Cedar Rapids, Iowa; Tinker Air Force Base, Oklahoma; and Huntsville, Alabama, and is expected to be completed by June 14, 2033. This contract was a sole source acquisition. Fiscal 2023 operations and maintenance funds in the amount of $7,443,699 are being obligated at time of award. The Legacy Tanker Branch at Tinker AFB, Oklahoma, is the contracting activity (FA8105-23-D-B001).